/* ==========================================================================
   Bane Focus Lab — design system
   Navy / mint / amber, light background, memory-card & connection motifs.
   ========================================================================== */

:root {
  --navy-900: #0f1d33;
  --navy-700: #1b2f4e;
  --navy-500: #2c4870;
  --mint-600: #0f9d8a;
  --mint-500: #2bbfa6;
  --mint-100: #e3f6f1;
  --amber-600: #e08900;
  --amber-500: #f6a623;
  --amber-100: #fff3dd;
  --bg: #f7f9fc;
  --surface: #ffffff;
  --surface-raised: #ffffff;
  --text: #182236;
  --text-muted: #556079;
  --border: #dfe6f0;
  --border-strong: #c3cedf;
  --success: #0f9d6a;
  --danger: #c4432f;
  --focus-ring: #1b61e0;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(15, 29, 51, 0.06), 0 1px 1px rgba(15, 29, 51, 0.04);
  --shadow-md: 0 8px 24px rgba(15, 29, 51, 0.08);
  --shadow-lg: 0 18px 40px rgba(15, 29, 51, 0.12);
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --maxw: 1180px;
  --dur: 180ms;
}

@media (prefers-reduced-motion: reduce) {
  :root { --dur: 0ms; }
}

/* -------------------------------------------------- reset */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  font-family: var(--font-base);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  font-size: 16.5px;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--mint-600); text-decoration-thickness: 1.5px; }
a:hover { color: var(--navy-700); }
h1, h2, h3, h4 { color: var(--navy-900); line-height: 1.22; font-weight: 750; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 1.6rem + 1.8vw, 3rem); }
h2 { font-size: clamp(1.5rem, 1.3rem + 0.9vw, 2.1rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }
ul, ol { padding-left: 1.3em; }
button { font-family: inherit; }

/* -------------------------------------------------- utility */
.shell { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: 12px; top: -48px; background: var(--navy-900); color: #fff;
  padding: 10px 16px; border-radius: var(--radius-sm); z-index: 100; transition: top var(--dur);
}
.skip-link:focus { top: 12px; }
:focus-visible { outline: 3px solid var(--focus-ring); outline-offset: 2px; border-radius: 4px; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 6px; font-size: 0.78rem; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--mint-600);
}
.section { padding: 64px 0; }
.section--tight { padding: 40px 0; }
.section--alt { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.text-muted { color: var(--text-muted); }
.center { text-align: center; }
.stack-sm > * + * { margin-top: 10px; }
.stack-md > * + * { margin-top: 20px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 650; font-size: 0.98rem; padding: 12px 22px; border-radius: 999px;
  border: 2px solid transparent; cursor: pointer; text-decoration: none;
  transition: transform var(--dur) ease, box-shadow var(--dur) ease, background var(--dur) ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--navy-900); color: #fff; }
.btn-primary:hover { background: var(--navy-700); color: #fff; }
.btn-amber { background: var(--amber-500); color: var(--navy-900); }
.btn-amber:hover { background: var(--amber-600); color: var(--navy-900); }
.btn-mint { background: var(--mint-500); color: #05261f; }
.btn-mint:hover { background: var(--mint-600); color: #fff; }
.btn-outline { background: transparent; border-color: var(--border-strong); color: var(--navy-900); }
.btn-outline:hover { border-color: var(--navy-700); }
.btn-ghost { background: transparent; color: var(--navy-900); padding: 10px 14px; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn-block { width: 100%; }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 24px; box-shadow: var(--shadow-sm);
}
.badge {
  display: inline-flex; align-items: center; gap: 6px; font-size: 0.74rem; font-weight: 700;
  padding: 4px 10px; border-radius: 999px; text-transform: uppercase; letter-spacing: 0.05em;
}
.badge--beginner { background: var(--mint-100); color: var(--mint-600); }
.badge--intermediate { background: var(--amber-100); color: var(--amber-600); }
.badge--advanced { background: #fde4e0; color: var(--danger); }

/* -------------------------------------------------- header */
.site-header {
  position: sticky; top: 0; z-index: 50; background: rgba(247, 249, 252, 0.92);
  backdrop-filter: saturate(140%) blur(8px); border-bottom: 1px solid var(--border);
}
.site-header__inner { display: flex; align-items: center; gap: 24px; padding: 14px 24px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; margin-right: auto; }
.brand__name { font-weight: 800; color: var(--navy-900); font-size: 1.12rem; letter-spacing: -0.01em; }
.brand__mark { position: relative; width: 30px; height: 24px; flex: none; }
.brand__card { position: absolute; width: 22px; height: 16px; border-radius: 4px; }
.brand__card--back { background: var(--mint-500); top: 0; left: 8px; }
.brand__card--front { background: var(--amber-500); bottom: 0; left: 0; }

.primary-nav { display: flex; align-items: center; gap: 22px; }
.primary-nav a { color: var(--navy-900); text-decoration: none; font-weight: 600; font-size: 0.95rem; }
.primary-nav a:hover { color: var(--mint-600); }
.accessible-toggle {
  display: inline-flex; align-items: center; gap: 6px; border: 1.5px solid var(--border-strong);
  background: var(--surface); border-radius: 999px; padding: 7px 14px; font-size: 0.85rem; font-weight: 650;
  color: var(--navy-900); cursor: pointer;
}
.accessible-toggle::before {
  content: ""; width: 9px; height: 9px; border-radius: 50%; background: var(--border-strong);
}
.accessible-toggle[aria-pressed="true"] { border-color: var(--mint-600); background: var(--mint-100); }
.accessible-toggle[aria-pressed="true"]::before { background: var(--mint-600); }
.nav-toggle { display: none; background: transparent; border: none; cursor: pointer; padding: 8px; }
.nav-toggle__bar, .nav-toggle__bar::before, .nav-toggle__bar::after {
  content: ""; display: block; width: 22px; height: 2px; background: var(--navy-900); position: relative;
}
.nav-toggle__bar::before { position: absolute; top: -7px; }
.nav-toggle__bar::after { position: absolute; top: 7px; }

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; align-items: center; }
  .primary-nav {
    position: absolute; top: 100%; left: 0; right: 0; background: var(--surface);
    border-bottom: 1px solid var(--border); flex-direction: column; align-items: stretch;
    padding: 12px 24px 20px; gap: 14px; display: none;
  }
  .primary-nav.is-open { display: flex; }
  .accessible-toggle { align-self: flex-start; }
}

/* -------------------------------------------------- hero */
.hero { position: relative; overflow: hidden; padding: 72px 0 56px; }
.hero__bg {
  position: absolute; inset: 0; z-index: -1;
  background-image:
    radial-gradient(circle at 12% 18%, rgba(43,191,166,0.14), transparent 40%),
    radial-gradient(circle at 88% 12%, rgba(246,166,35,0.16), transparent 42%),
    radial-gradient(circle at 70% 85%, rgba(27,47,78,0.08), transparent 45%);
}
.hero__grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
@media (max-width: 920px) { .hero__grid { grid-template-columns: 1fr; } }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.hero__stats { display: flex; gap: 28px; margin-top: 32px; flex-wrap: wrap; }
.hero__stat strong { display: block; font-size: 1.5rem; color: var(--navy-900); }
.hero__stat span { font-size: 0.85rem; color: var(--text-muted); }

.memory-art { position: relative; height: 320px; }
.memory-art .mc {
  position: absolute; width: 112px; height: 76px; border-radius: 12px; box-shadow: var(--shadow-md);
  display: flex; align-items: center; justify-content: center; font-size: 1.6rem;
  animation: float 6s ease-in-out infinite;
}
@media (prefers-reduced-motion: reduce) { .memory-art .mc { animation: none; } }
.mc--1 { background: var(--mint-500); color: #05261f; top: 10%; left: 6%; transform: rotate(-8deg); animation-delay: 0s; }
.mc--2 { background: var(--amber-500); color: var(--navy-900); top: 2%; left: 42%; transform: rotate(5deg); animation-delay: 0.6s; }
.mc--3 { background: var(--navy-900); color: #fff; top: 38%; left: 66%; transform: rotate(-4deg); animation-delay: 1.1s; }
.mc--4 { background: #fff; border: 2px solid var(--border-strong); color: var(--navy-900); top: 52%; left: 18%; transform: rotate(6deg); animation-delay: 1.6s; }
.mc--5 { background: var(--mint-100); color: var(--mint-600); border: 2px solid var(--mint-500); top: 66%; left: 54%; transform: rotate(-6deg); animation-delay: 2.1s; }
@keyframes float { 0%, 100% { transform: translateY(0) rotate(var(--r, 0deg)); } 50% { transform: translateY(-10px); } }
.memory-art svg.links { position: absolute; inset: 0; width: 100%; height: 100%; }

/* -------------------------------------------------- category / content grids */
.grid { display: grid; gap: 22px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 920px) { .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; } }

.cat-card {
  display: flex; flex-direction: column; gap: 10px; text-decoration: none; color: inherit;
  transition: transform var(--dur) ease, box-shadow var(--dur) ease;
}
.cat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.cat-card__icon {
  width: 46px; height: 46px; border-radius: 12px; background: var(--mint-100); color: var(--mint-600);
  display: flex; align-items: center; justify-content: center; font-size: 1.35rem;
}
.cat-card h3 { margin: 0; }
.cat-card p { margin: 0; color: var(--text-muted); font-size: 0.94rem; }
.cat-card__meta { margin-top: auto; font-size: 0.82rem; color: var(--navy-500); font-weight: 650; }

.article-card { display: flex; flex-direction: column; gap: 10px; text-decoration: none; color: inherit; }
.article-card h3 { margin: 0; color: var(--navy-900); }
.article-card:hover h3 { color: var(--mint-600); }
.article-card p { color: var(--text-muted); font-size: 0.94rem; margin: 0; }
.article-card__tag { font-size: 0.76rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--mint-600); }

/* -------------------------------------------------- forms */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 18px; }
.field label { font-weight: 650; font-size: 0.92rem; }
.field input, .field select, .field textarea {
  font: inherit; padding: 11px 14px; border-radius: var(--radius-sm); border: 1.5px solid var(--border-strong);
  background: var(--surface); color: var(--text);
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--mint-600); }
.search-box { display: flex; gap: 10px; max-width: 520px; }
.search-box input { flex: 1; }

/* -------------------------------------------------- quiz: setup */
.option-pills { display: flex; flex-wrap: wrap; gap: 10px; }
.option-pill {
  border: 1.5px solid var(--border-strong); background: var(--surface); padding: 10px 18px;
  border-radius: 999px; cursor: pointer; font-weight: 650; font-size: 0.92rem; color: var(--navy-900);
}
.option-pill[aria-pressed="true"] { background: var(--navy-900); border-color: var(--navy-900); color: #fff; }
.setup-summary { background: var(--mint-100); border-radius: var(--radius-md); padding: 18px 20px; font-size: 0.95rem; }

/* -------------------------------------------------- quiz: play */
.quiz-shell { max-width: 760px; margin: 0 auto; }
.progress-track { height: 10px; border-radius: 999px; background: var(--border); overflow: hidden; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--mint-500), var(--amber-500)); transition: width var(--dur) ease; }
.progress-meta { display: flex; justify-content: space-between; font-size: 0.85rem; color: var(--text-muted); margin: 8px 0 28px; }

.stimulus-box {
  background: var(--navy-900); color: #fff; border-radius: var(--radius-lg); padding: 28px;
  display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; align-items: center;
  margin-bottom: 22px; min-height: 100px;
}
.stimulus-chip {
  background: rgba(255,255,255,0.1); border: 1.5px solid rgba(255,255,255,0.25); border-radius: 12px;
  padding: 10px 16px; font-size: 1.2rem; font-weight: 700; letter-spacing: 0.02em;
}
.stimulus-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(60px, 1fr)); gap: 10px; width: 100%; }
.stimulus-note { width: 100%; text-align: center; font-size: 0.85rem; color: rgba(255,255,255,0.75); margin-top: 6px; }
.reveal-controls { display: flex; justify-content: center; gap: 12px; margin-bottom: 22px; }

.question-prompt { font-size: 1.3rem; font-weight: 700; color: var(--navy-900); margin-bottom: 18px; }
.options-list { list-style: none; margin: 0 0 24px; padding: 0; display: grid; gap: 12px; }
.option-btn {
  width: 100%; text-align: left; padding: 15px 18px; border-radius: var(--radius-md);
  border: 1.5px solid var(--border-strong); background: var(--surface); cursor: pointer;
  font: inherit; font-size: 1rem; display: flex; gap: 12px; align-items: flex-start;
  transition: border-color var(--dur), background var(--dur);
}
.option-btn:hover { border-color: var(--mint-500); }
.option-btn__letter {
  flex: none; width: 28px; height: 28px; border-radius: 50%; background: var(--mint-100); color: var(--mint-600);
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 0.85rem;
}
.option-btn[aria-checked="true"] { border-color: var(--navy-900); background: var(--mint-100); }
.option-btn.is-correct { border-color: var(--success); background: #e8f7ef; }
.option-btn.is-correct .option-btn__letter { background: var(--success); color: #fff; }
.option-btn.is-incorrect { border-color: var(--danger); background: #fcebe8; }
.option-btn.is-incorrect .option-btn__letter { background: var(--danger); color: #fff; }
.option-btn[disabled] { cursor: default; }

.feedback-panel {
  border-radius: var(--radius-md); padding: 18px 20px; margin-bottom: 22px; border: 1.5px solid var(--border);
  background: var(--surface);
}
.feedback-panel--correct { border-color: var(--success); background: #eefbf3; }
.feedback-panel--incorrect { border-color: var(--danger); background: #fdefed; }
.feedback-panel h3 { margin: 0 0 6px; font-size: 1rem; }
.feedback-panel p { margin: 0 0 8px; font-size: 0.95rem; }
.feedback-panel a { font-weight: 650; }

.quiz-actions { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }

/* -------------------------------------------------- results */
.score-ring {
  width: 148px; height: 148px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  background: conic-gradient(var(--mint-500) calc(var(--pct,0) * 1%), var(--border) 0); margin: 0 auto 18px;
}
.score-ring__inner {
  width: 118px; height: 118px; border-radius: 50%; background: var(--surface); display: flex;
  flex-direction: column; align-items: center; justify-content: center;
}
.score-ring__inner strong { font-size: 1.6rem; color: var(--navy-900); }
.score-ring__inner span { font-size: 0.75rem; color: var(--text-muted); }
.category-breakdown { display: grid; gap: 10px; margin: 24px 0; }
.category-breakdown__row { display: flex; align-items: center; gap: 12px; }
.category-breakdown__bar { flex: 1; height: 8px; border-radius: 999px; background: var(--border); overflow: hidden; }
.category-breakdown__fill { height: 100%; background: var(--mint-500); }
.notice-box {
  border: 1.5px dashed var(--amber-500); background: var(--amber-100); border-radius: var(--radius-md);
  padding: 16px 18px; font-size: 0.92rem; color: var(--navy-900);
}

.review-item { border-bottom: 1px solid var(--border); padding: 18px 0; }
.review-item:last-child { border-bottom: none; }
.review-item__q { font-weight: 700; margin-bottom: 8px; }
.review-item__pill { font-size: 0.75rem; font-weight: 700; padding: 3px 9px; border-radius: 999px; margin-left: 8px; }
.review-item__pill--correct { background: #e8f7ef; color: var(--success); }
.review-item__pill--incorrect { background: #fcebe8; color: var(--danger); }

/* -------------------------------------------------- article */
.article-hero { padding: 56px 0 32px; }
.article-body { max-width: 720px; margin: 0 auto; font-size: 1.08rem; }
.article-body h2 { margin-top: 1.7em; }
.article-body h3 { margin-top: 1.4em; }
.article-body ul, .article-body ol { margin-bottom: 1.2em; }
.article-meta { display: flex; gap: 14px; flex-wrap: wrap; font-size: 0.86rem; color: var(--text-muted); margin-bottom: 18px; }
.source-list { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border); }
.source-list li { margin-bottom: 6px; }

/* -------------------------------------------------- footer */
.site-footer { background: var(--navy-900); color: rgba(255,255,255,0.82); margin-top: 72px; }
.site-footer__inner { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 36px; padding: 52px 24px 36px; }
@media (max-width: 760px) { .site-footer__inner { grid-template-columns: 1fr; } }
.site-footer h2 { color: #fff; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; margin: 0 0 14px; }
.site-footer__brand .brand__name { color: #fff; font-weight: 800; font-size: 1.1rem; }
.site-footer__col { display: flex; flex-direction: column; gap: 10px; }
.site-footer__col a { color: rgba(255,255,255,0.78); text-decoration: none; font-size: 0.94rem; }
.site-footer__col a:hover { color: #fff; }
.site-footer__bottom { padding: 18px 24px; border-top: 1px solid rgba(255,255,255,0.12); font-size: 0.82rem; }

/* -------------------------------------------------- misc pages */
.page-hero { padding: 56px 0 24px; }
.prose { max-width: 760px; font-size: 1.04rem; }
.prose h2 { margin-top: 1.6em; }
.breadcrumbs { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 18px; }
.breadcrumbs a { color: var(--text-muted); }
.error-404 { text-align: center; padding: 90px 0; }
.error-404__code { font-size: 5rem; font-weight: 800; color: var(--mint-500); margin: 0; }

/* -------------------------------------------------- reduced-motion / accessible mode */
body.accessible-mode .memory-art .mc { animation: none !important; }
body.accessible-mode * { transition-duration: 0ms !important; animation-duration: 0ms !important; }
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}